my nextMonthAction() method won't work in a fragment class and will give an error

  
// public class CalendarFragment extends Fragment {
//    @Override
//    public void onCreate(Bundle savedInstanceState) {
//        super.onCreate(savedInstanceState);
//        Intent intent = new Intent(getActivity(), CalendarActivity.class);
//        startActivity(intent);
//    }

public class CalendarFragment extends Fragment implements CalendarAdapter.OnItemListener{
    private TextView monthYearText;
    private RecyclerView calendarRecyclerView;
    private LocalDate selectedDate;



    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment_calendar, container, false);

        // Inflate the layout for this fragment
        return view;
    }

    @Override
    public void onStart() {
        super.onStart();
        initWidgets();
        selectedDate = LocalDate.now();
        setMonthView();
    }

    private void initWidgets() {
        calendarRecyclerView = getActivity().findViewById(R.id.calendarRecyclerView);
        monthYearText = getActivity().findViewById(R.id.monthYearTV);
    }


    @Override
    public void onItemClick(int position, String dayText) {
        if(!dayText.equals("")) {
            String message = "Selected Date " + dayText + " " + monthYearFromDate(selectedDate);
        }
    }


    private ArrayList<String> daysInMonthArray(LocalDate date) {
        ArrayList<String> daysInMonthArray = new ArrayList<>();
        YearMonth yearMonth = YearMonth.from(date);

        int daysInMonth = yearMonth.lengthOfMonth();

        LocalDate firstOfMonth = selectedDate.withDayOfMonth(1);
        int dayOfWeek = firstOfMonth.getDayOfWeek().getValue();

        for(int i = 1; i <= 42; i++) {
            if(i <= dayOfWeek || i > daysInMonth + dayOfWeek) {
                daysInMonthArray.add("");
            }

            else {
                daysInMonthArray.add(String.valueOf(i - dayOfWeek));
            }
        }
        return  daysInMonthArray;
    }

    private String monthYearFromDate(LocalDate date) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MMMM yyyy");
        return date.format(formatter);
    }

    public void previousMonthAction (View view) {
        selectedDate = selectedDate.minusMonths(1);
        setMonthView();
    }

    public void nextMonthAction(View view) {
        selectedDate = selectedDate.plusMonths(1);
        setMonthView();
    }

    @Override
    public void setMonthView() {
        monthYearText.setText(monthYearFromDate(selectedDate));
        ArrayList<String> daysInMonth = daysInMonthArray(selectedDate);

        CalendarAdapter calendarAdapter = new CalendarAdapter(daysInMonth, this);
        RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getActivity().getApplicationContext(), 7);
        calendarRecyclerView.setLayoutManager(layoutManager);
        calendarRecyclerView.setAdapter(calendarAdapter);
    }
}

java.lang.IllegalStateException: Could not find method previousMonthAction(View) in a parent or ancestor Context for android:onClick attribute defined on view class androidx.appcompat.widget.AppCompatButton
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:479)
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:437)
        at android.view.View.performClick(View.java:8160)
        at android.widget.TextView.performClick(TextView.java:16222)
        at android.view.View.performClickInternal(View.java:8137)
        at android.view.View.access$3700(View.java:888)
        at android.view.View$PerformClick.run(View.java:30236)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:246)
        at android.app.ActivityThread.main(ActivityThread.java:8615)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)